What does x== mean in c language

In C language, x== is an equality comparison operator, which checks whether the values ​​of two operands are equal and returns true if so, otherwise it returns false. For example: int x = 5; int y = 5; if (x == y) { printf("x and y are equal\n"); }

What does x== mean in C language?

In C language, x== is the equality comparison operator. It checks if the values ​​of the two operands are equal, if so, it returns true (1), otherwise it returns false (0).

Syntax:

<code class="c">x == y</code>

where x and y are expressions of any type.

Example:

<code class="c">int x = 5;
int y = 5;

if (x == y) {
    printf("x和y相等\n");
}</code>

In this case, the value of x == y is true because the values ​​of x and y are equal.

Note:

• Equality comparison operators are uppercase and lowercase sensitive.
• For floating-point numbers, equality comparisons may not be exact because the representation of floating-point numbers is approximate.
• The equality comparison operator can also be used for pointer comparison, but it only checks whether the pointer points to the same memory address.

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